Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a91c112e2e4595…

MALICIOUS

PDF

58.8 KB Created: 2020-08-30 00:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d23ac1c1d13ca4634e61dd736d4d8e9 SHA-1: 431c60107163c9915df2829827b5ba89f4aebad0 SHA-256: 30a91c112e2e4595793a921eb4df708a1b180b0e4fbe81eefcfc8b241a1adf9e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a mass of external links. The document body, though heavily obfuscated, contains the malicious URL and references to PDF files, reinforcing the link farm tactic. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=mid+america+oireachtas+locations
    • https://static.usrfiles.com/ugd/b8c837_87a516062ef44e1086815e32c2978577.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ce3de2a0dbe44b98f7ad2a3844927c0.pdf
    • https://static.usrfiles.com/ugd/bb13a2_01c147f0c9154e249b78616180c30f84.pdf
    • https://static.usrfiles.com/ugd/409ca8_6387751039e642c396c45d8faac2923d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb3e57e73b34600926a1f02be3caadf.pdf
    • https://static.usrfiles.com/ugd/b8c837_0613e8e5969744308a8b6aa6976a128a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f00786febb774dfcb39f79a1bc40f0bc.pdf
    • https://static.usrfiles.com/ugd/b7306e_329837c2e3d848278fecbbfb1e3e2ee9.pdf
    • https://static.usrfiles.com/ugd/a107db_239e23274b214541bc053188e3fa44c3.pdf
    • https://static.usrfiles.com/ugd/7f46b5_085eaf7dfba74870ba65f377db151356.pdf
    • https://static.usrfiles.com/ugd/8acad3_d342caf7c2964148a8323a853b749e4c.pdf
    • https://static.usrfiles.com/ugd/73f3b0_513175ec63c040b791ab05980ba7f410.pdf
    • https://static.usrfiles.com/ugd/b8c837_55d9617a8c86423a9f1b3d48f3c18a84.pdf
    • https://static.usrfiles.com/ugd/067ecb_e157ac00ebd94625b7cc0e776d32d747.pdf
    • https://static.usrfiles.com/ugd/ad2ade_c585fef45e484de2b9ad76cd892d1269.pdf
    • https://static.usrfiles.com/ugd/21e6f2_f5f0871d3ada4fdb8ace2ff966451fdb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006662.bin
68a698726b3f3597a8f9e99799e4ae415e4c49625695b5075f2c9fad1799980d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6662 4972 bytes
font_01_sfnt_off0000770d.bin
1e6c207286cbf83a3b121926a2730211e6a0da7f83a8d5b2cbaa0ac79cdb1024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770D 9220 bytes
font_02_sfnt_off000090a4.bin
aa5521e37367114c743177f4179842b98aad97cb90ad292aa53cc440e8b46b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A4 11196 bytes
font_03_sfnt_off0000b6d8.bin
4f0d11c88edb495dd981db84d88604dc23b950c6abc1735eb04a95b716c1a05c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D8 17104 bytes
font_04_sfnt_off0000cee1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE1 4324 bytes

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